By surprise, Apple today released the iOS 12.4.2 (build 16G114) and the watchOS 5.3.2 (16U611) for some models of iPhones, iPads, iPods touch, and Apple Watches. Yes, even after launching iOS 13 and watchOS 6, the company has released versions for its old operating systems.
In the case of iOS, Apple reported (thanks for the tip, Anderson Silva!) which fixed a loophole that could be used by a remote attacker and could lead to an unexpected application termination or arbitrary code execution and it is quite possible that watchOS and macOS (more about it below) followed the same path.
IOS 12.4.2 is only available for devices running iOS 12 and out of 13. They are: iPhones 5s, 6 and 6 Plus; iPad mini 2, 3 and iPad Air; beyond iPod touch (6th generation). WatchOS 5.3.2 is now available for Apple Watches Series 1 and 2 only.
In iGadgets, to upgrade just go to General Settings Software Update and follow the onscreen instructions; on Apple Watch, I need to open the Watch app and on the "My Watch" tab, go to General Software Update.
If you want to manually install iOS 12.4.2, just use the links below:
MacOS Mojave Supplemental Update 2 10.14.6
At the same time, Apple has also released a new supplemental update for users running macOS Mojave 10.14.6. According to the company, it is recommended for all users and improves the security of macOS.
For those who are in previous versions of the system, they have also been Security Update 2019-005 High Sierra it's the Security Update 2019-005 Sierra with the same security fixes.
To upgrade, go to System Preferences Software Update and follow the instructions.